This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A250971 #6 Jul 23 2025 12:55:37 %S A250971 7448,489543,32124018,2112130109,138900769559,9135168475316, %T A250971 600808386292820,39514486757351514,2598824818868706096, %U A250971 170921926401546121395,11241352463500152822391,739331740764868834365986 %N A250971 Number of (n+1)X(6+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements. %C A250971 Column 6 of A250973 %H A250971 R. H. Hardin, <a href="/A250971/b250971.txt">Table of n, a(n) for n = 1..210</a> %H A250971 R. H. Hardin, <a href="/A250971/a250971.txt">Empirical recurrence of order 57</a> %F A250971 Empirical recurrence of order 57 (see link above) %e A250971 Some solutions for n=1 %e A250971 ..1..0..1..1..0..0..1....1..0..0..1..1..0..1....0..1..1..1..0..1..1 %e A250971 ..1..1..0..1..0..0..1....0..0..1..0..0..1..0....1..0..0..0..0..1..1 %K A250971 nonn %O A250971 1,1 %A A250971 _R. H. Hardin_, Nov 29 2014